Sean McLeod

Hmm, so based on that video how sure are you that it isn't a simple example of a stall and then spin? Use JSBSim's logging facilities to log useful state...

> It is neither a problem of stall or spin, since it happened also during a normal level flight or a simple visual circuit. Although the video link you submitted,...

> v1.01 was updated to run JSB at 120hz, no matter what Unreal Engine runs at. So if you run Unreal Engine at 10fps or 200fps, JSB still goes 120hz....

> We have also to understand what is the impact of jsbsim running at 120hz and UE at around 40-60fps. There shouldn't really be an issue. The UE screen refreshes...

Can you not plot the relevant data from the JSBSim output log showing say from 2s before the issue to 2s after the issue appears? And attach a snippet of...

Did you notice the massive increase in CAS between the video frames you posted? Did you notice anything else that I haven't spotted in the video frame data when you...

@dpculp well spotted. Visually and looking at the altitude values it appears the aircraft is a fair distance from the ground. However I wonder if there is a bug in...

Although in Flight 2, none of the 3 screenshots show a WOW for any of the gears at least displayed. Is this because there was a brief WOW in-between the...

@ImKogane so definitely make sure you log gear data and also elevation data so that we can see whether the issue you're seeing is specifically due to JSBSim thinking that...

> specific path to find the files I don't think JSBSim does anything specific to the path, so I'm guessing it will be in the `current` directory for your process....